Improved mahble-sawmo- machine



C. H. G. PEASE., OF 'DANBURY, C O.NNECTCUT. Lena; mam No. 87,701, amd March 9, 1869.

Theliedule :ofen'ed ta in these Letters Patent and'making part of the same.

To all who'm it 'may concern; v

Be it known that I, O. H. G. PEASE, of Danbury, in the county of Fairfield, and Stateof Connecticut, have invented new and useful Improvements in Marble- Sawing Machines; and I do hereby declare that the fol- The object of this irivention is to accomplish thesawing of marble and other stone in circular block's,witl1 a simple and effective apparatus.

It consists insuspending the block to be sawn inf trunnions beforea horizontal reciprocating saw, the

construction and operation of which are herein fully set 1 forth. v-

In the accompanying drawings- O is'the block suspended upon trunnions g g, which are fir'mly secured in`sockets or holes in the block, by melted leador sulphur. w

i The trunnions rest on pillow-blocks E E, which latter are brought to tli'e proper height by means of foun-` dation-bl'ocks D D.- i

'The saw d may be of theusnal kind employed-'in sawing marble, but is strained across the lower part of theA frame b b' b, which'latter plays to and fro,fwith a reci rocating motion, in'the guides e. e, supported by. the uprights fifrom the base-blocks A A, which latter .are grooved for the reception of the feet a a, on the lower ends of lthe saw-frame, as shown.

By means'of the grooves and guides, the saw-frame is guided in its toand-fi'o motion, which'motion is imparted tov it byan'y connecting-rod or pitman, operated:

by a crank, eccentric, or cam.

The block is brought in contact with the saw by moving up the foundation-blocks D to the proper position. W

The trunnions may be provided with a lever-handle, i, for turning' the block as the saw cuts it, and an arm, j, and weight, lt, to balance the block, when one or morecorners are sawn ofl`,'thus bringing the trunnibns vout of the liiie'of the centre of gravity.

A rai'chet-wheel, Z, with a pawl, may be aflixed on one of the trunnions, to keep the block from swinging over`when a corner is .cut off' from the block.

' These devices for controlling the block in the trunnions, may be variously modified, and are easily devised by any person skilled in mechanism, and I have not atte pted to elaborate or perfect this portion of the apparatus.

One of the blocks D can be moved forward of the other, thus bringing the' block O obliquely to thev saw, whereby the block will besawn'in a conioal form, of more or less acuteness, according to the position of the block with respect to the saw.

' I am aware that blocks have been hung in a chair provided with trnnnions, and sawn in a circular form,

by a belt-saw, (see patent granted' to Norman and Mc' Lean, No. 21,622) but that invention necessitated the handling of the block to. get it into the frame or carriage, whichlatter is susceptible of being rotated.

vThis mechanism is, moreover, complicated, and liai ble to derangement, and is not capable of cutting the` block in oonical form, as is my invention.` v

Although any narrow marble-saw, as a Wire, may be used with my invention, I prcfer to use a rod or wire having a triangular section, as'shown in fig. 3, and

. which I desire especially to claim, as it operates more leasily and effectively, in sawing curves in marble, than the saws heretofore used for this purpose, and it may be employed in any machine for sawing marble in curves,

as advantageously the one herein set forth.

fi It is arranged with its base downward, as shown in I claim as new, and desire to secure by Letters Patent- 1. The devices herein described, for sawing marble i in cylindrical or conical forms, constructed, arranged, and Operating substantially 'as and for the purpose set forth and shown.

2. The rod or wire saw, having a triangular crosssection, combined with the machine herein described, for sawing marble in curves, substantially as and for 'the purpose spccified.

ALEX. IE. RoBnms. 

